Revision 10:c7ac4fd52536, committed 2015-02-18

Comitter:

scohennm

Date:

Wed Feb 18 15:08:07 2015 +0000

Parent:

9:08acb96591a8

Child:

11:c842619c49a1

Commit message:

Include time window and logic modifications. Note that accelerometer sometimes needs to be powered off to clear settings.

Changed in this revision

--- a/main.cpp	Mon Feb 16 20:06:22 2015 +0000
+++ b/main.cpp	Wed Feb 18 15:08:07 2015 +0000
@@ -2,10 +2,10 @@
 #include "MMA8451Q8g.h"
 #include "SLCD.h"
 
-#define BLINKTIME   0.7
+#define BLINKTIME   0.2
 #define RELAYON     0
 #define RELAYOFF    1
-#define LEDDELAY    0.75
+#define LEDDELAY    0.4
 #define WAITDELAY   0.7
 #define LCDLEN      10
 
@@ -18,6 +18,7 @@
 #define REG_PULSE_CFG     0x21
 #define REG_PULSE_SRC     0x22
 #define REG_PULSE_THSZ    0x25
+#define REH_PULSE_TMLT    0x25
 #define REG_CTRL_4        0x2D
 #define REG_CTRL_5        0x2E
 
@@ -26,7 +27,8 @@
 #define MAX_8G            0x02
 #define SET_INTERRUPT     0x08
 #define SET_INT_LINE      0x08
-
+#define SET_THZ           0x20 // See Table 49 in data sheet
+#define SET_TMLT          0x18 // See Talbe 51 in data sheet
 
 //#define PRINTDBUG
 // Accelerometer SPI pins
@@ -69,21 +71,24 @@
         slcd.printf(lMess);
 } 
 
-
+// Interrupt routines
 void LEDBlinker(){  // RED LED interrupt
     outState = !outState; 
     myled.write(outState);
 }
 
 void GreenLEDBlinker(){  // Green LED interrupt
+    //uint8_t i_regData; 
     relayState = !relayState; 
     relay.write(relayState);
-}
-        
+    //acc.readRegs(REG_PULSE_SRC, &i_regData, 1); // Clear the tap event
+}        
+
+// end interrupt routines
 
 int main()
 {
-    uint8_t regData = MAX_4G; 
+    uint8_t regData; 
     uint8_t latchData = 0x40; //0b01000000; //for pulse config register
     uint8_t axisData = 0x10; //0b00010000;
 
@@ -97,43 +102,44 @@
     MMA8451QInt1.mode(PullNone); 
    
 // set up interrrupts to be used later for taps
-//    mybutton.fall(&pressed);
     ledBlink.attach(&LEDBlinker, LEDDELAY);
-        
+  
+// Read Pulse Source Data and check to see if things have been set
+    acc.readRegs(REG_PULSE_CFG, &regData, 1);  // check it
+    sprintf (lcdData,"%x",regData);
+    LCDMess(lcdData,BLINKTIME); 
+    
+// *********** Initialize for tap tecognition ***********      
+    regData = latchData | axisData;
+    acc.setRegisterInStandby(REG_PULSE_CFG, regData); // write the data
+    acc.readRegs(REG_PULSE_CFG, &regData, 1);  // check it
+    sprintf (lcdData,"%x",regData);
+    LCDMess(lcdData,BLINKTIME);     
+    
 // Check to see if accerlometer is alive and well
-    acc.setGLimit(MAX_2G); // For now set to 2g
+    acc.setGLimit(MAX_4G); // For now set to 2g
     acc.readRegs(XYZ_DATA_CFG, &regData, 1);
     sprintf (lcdData,"%x",regData); // Note displaying in hexidecimal
     LCDMess(lcdData,BLINKTIME);
     
+// Setup single-tap pulse prarameters.
+   acc.setRegisterInStandby(REG_PULSE_THSZ, SET_THZ); // write the data
+   acc.setRegisterInStandby(REH_PULSE_TMLT, SET_TMLT); // write the data 
+      
 // Set up (pulse) interrupt to INT1 pin
     acc.setRegisterInStandby(REG_CTRL_4, SET_INTERRUPT); // write the data
     acc.setRegisterInStandby(REG_CTRL_5, SET_INT_LINE); // write the data
-    
+// End or seetup    
+
     acc.readRegs(REG_WHO_AM_I, &regData, 1);
     sprintf (lcdData,"%x",regData);
     LCDMess(lcdData,BLINKTIME); 
-    
+  
     
     while (true) { 
-
-    // Read Pulse Source Data and check to see if things have been set
-        acc.readRegs(REG_PULSE_CFG, &regData, 1);  // check it
-        sprintf (lcdData,"%x",regData);
-        LCDMess(lcdData,BLINKTIME); 
-        
-        regData = latchData | axisData;
-        acc.setRegisterInStandby(REG_PULSE_CFG, regData); // write the data
-        acc.readRegs(REG_PULSE_CFG, &regData, 1);  // check it
-        if (regData == 0xC0 || regData == 0xC4)
-            //z-axis event detected
-        sprintf (lcdData,"%x",regData);
-        LCDMess(lcdData,BLINKTIME); 
-                
         acc.readRegs(REG_PULSE_SRC, &regData, 1);
         sprintf (lcdData,"%x",regData);
-        LCDMess(lcdData,BLINKTIME);        
-        
+        LCDMess(lcdData,BLINKTIME);           
         LCDMessNoDwell(LCDMessages[relayState]);  
         wait(delay);
     }